Feature request: dropbear options

It would be nice if the "SSH Daemon" section would have a line for adding custom configuration options to the dropbear server.

For example, I use the dropbear server for maintaining open port-forwarding connections. I have recently found that these connections are being closed when they die. As a result, port forwarding stops working because ports are "in use". Adding the -I idle timeout option would be nice.
Perhaps other people might want to use the keep-alive option -K.

I am sure this is easy to implement. I would be grateful to anyone who can do this.